package example;
class Student3 {
    String name ;
    int age ;
    void read(){
        System.out.println("大家好，我是"+name+"年龄"+age);
    }
}
public class Example02 {
    public static void main(String[] args) {
        Student3 stu1 = new Student3();
        Student3 stu2 = null;
        stu2= stu1;
        stu1.name  = "小明";
        stu1.age= 20;
        stu2.age= 50;
        stu1.read();
        stu2.read();
    }
}
